309373940028 has 12 divisors (see below), whose sum is σ = 721872526760. Its totient is φ = 103124646672.

The previous prime is 309373940023. The next prime is 309373940041. The reversal of 309373940028 is 820049373903.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309373940023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12890580823 + ... + 12890580846.

Almost surely, 2^309373940028 is an apocalyptic number.

It is an amenable number.

309373940028 is an abundant number, since it is smaller than the sum of its proper divisors (412498586732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

309373940028 is a wasteful number, since it uses less digits than its factorization.

309373940028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25781161676 (or 25781161674 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 48.

The spelling of 309373940028 in words is "three hundred nine billion, three hundred seventy-three million, nine hundred forty thousand, twenty-eight".